There is no alfalfa herb in the Pharmacopoeia, which may refer to one branch of yellow flower. Yizhihuanghua has the efficacy and effect of dispersing wind-heat, clearing heat and removing toxins (removing heat and toxins from the body), and its contraindication is that it is forbidden for those who are allergic to this product, and should be used with caution for those who are pregnant and those who have a weak spleen and stomach (spleen and stomach are weak and cold), and those who have loose stools. Yizhihuanghua is the whole herb of Asteraceae plant, which is pungent, bitter and cool in nature, with the efficacy of evacuating wind-heat, clearing heat and removing toxins, and can be used for treating wind-heat colds, headaches, sore throats, coughs of lung-heat, jaundice, diarrhea, feverish drenching (burning and stinging pains are obvious during urination, accompanied by frequent urination and urgent urination, and discomfort of pulling in the small abdomen), carbuncles, swellings, sores and other diseases. The adverse reactions of this product are not clear. Note that this product is prohibited for those who are allergic to this product, allergic individuals should be cautious, pregnant women and people with cold spleen and stomach, loose stools should be cautious. If you need to use this product, you should be under the guidance of a physician, do not unauthorized use of medication, so as not to cause adverse consequences.